You mean like the tricuspid and mitral (bicuspid) valves?
Answer:
13) 10b^2a^4
14) -5y^3+35y^2-10y
maybe a hundred or a thousand years idk so maybe 500 i dont actually know
It’s not the same because if you simplify them there going to end up looking different (the answers) And they get a whole different do you denominator a numerator